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Nature of Business and Basis of Presentation (Narrative) (Details) - USD ($)
$ in Millions
1 Months Ended 9 Months Ended
Aug. 30, 2020
Sep. 30, 2021
Mar. 16, 2020
Mar. 03, 2020
Federal reserve reduced target federal funds rate basis point     1.00% 0.50%
Line of credit   $ 15.0    
COVID-19 pandemic [Member]        
Market interest rates 0.52% 1.50%    
Minimum [Member]        
Federal funds rate   0.00%    
Maximum [Member]        
Federal funds rate   0.25%    
Holding Company Line of Credit [Member]        
Line of credit borrowing capacity   $ 15.0